Ответ:
Пошаговое объяснение:
671)
(1)
1) -6 3/4 * 5 1/3 = -27/4 * 16/3 = -36
2) 4 1/3 * 3 3/13 = 13/3 * 42/13 = 14
3) -36 - 14 = -50
ответ: 50
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(2)
1) -2 1/6 + 1/4 = -2 2/12 + 3/12 = -1 11/12
2) -1 11/12 * (-2 2/11) = -23/12 * (-24/11) = 46/11 = 4 2/11
ответ: 4 2/11
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(3)
1) 3 6/7 * (-2 1/3) = 27/7 * (-7/3) = -9
2) 8/9 * (-1 7/8) = 8/9 * (-15/8) = -5/3 = -1 2/3
3) -9 - (-1 2/3) = -9 + 1 2/3 = -7 1/3
ответ: -7 1/3
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(4)
1) -8 3/8 + 7 1/6 = -8 9/24 + 7 4/24 = -1 5/24
2) -1 5/24 * (-2 14/29) = -29/24 * (-72/29) = 3
ответ: 3
========================
672)
(1)
1) -8/15 * (-14/15) = 112/225
2) 112/225 : (-16/25) = 112/225 * (-25/16) = -7/9
ответ: -7/9
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(2)
1) -3/8 * (-9/10) = 27/80
2) 27/80 : (-27/32) = 27/80 * (-32/27) = -2/5
ответ: -2/5
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